WO2021125475A1 - 급속 충전용 전류 패턴 업데이트 장치, 방법 및 이를 수행하는 저장매체에 저장된 컴퓨터 프로그램 - Google Patents

급속 충전용 전류 패턴 업데이트 장치, 방법 및 이를 수행하는 저장매체에 저장된 컴퓨터 프로그램 Download PDF

Info

Publication number
WO2021125475A1
WO2021125475A1 PCT/KR2020/008568 KR2020008568W WO2021125475A1 WO 2021125475 A1 WO2021125475 A1 WO 2021125475A1 KR 2020008568 W KR2020008568 W KR 2020008568W WO 2021125475 A1 WO2021125475 A1 WO 2021125475A1
Authority
WO
WIPO (PCT)
Prior art keywords
current pattern
charging
battery module
current
updating
Prior art date
Application number
PCT/KR2020/008568
Other languages
English (en)
French (fr)
Korean (ko)
Inventor
남기민
오송택
조원태
임은성
정재민
이고운
Original Assignee
주식회사 엘지에너지솔루션
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 엘지에너지솔루션 filed Critical 주식회사 엘지에너지솔루션
Priority to CN202080071176.XA priority Critical patent/CN114514435A/zh
Priority to US17/771,624 priority patent/US20230022874A1/en
Priority to JP2022520242A priority patent/JP7376002B2/ja
Priority to EP20902599.8A priority patent/EP4033631A4/en
Publication of WO2021125475A1 publication Critical patent/WO2021125475A1/ko

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H02J7/0049—Detection of fully charged condition
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/005—Detection of state of health [SOH]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to an apparatus and method for updating a current pattern for rapid charging, and a computer program stored in a storage medium for performing the same.
  • the secondary battery is provided in the form of a battery pack including a battery module in which a plurality of battery cells are connected in series and/or in parallel, and a battery management system (BMS) that manages the operation of the battery module.
  • BMS battery management system
  • the battery pack performs rapid charging based on a current pattern for rapid charging as necessary. As the number of rapid charging increases, there is a concern that the capacity of the battery pack rapidly decreases.
  • the present invention has been made in view of this situation, and a current pattern update device and method for fast charging that efficiently perform rapid charging of the battery pack so as not to affect the lifespan of the battery pack, and a computer program stored in a storage medium for performing the same aims to provide
  • a resistance calculator for calculating the internal resistance of the battery module; a storage unit for storing a current pattern for fast charging for the battery module; and an operation unit that updates the current pattern according to the state of the internal resistance of the battery module, wherein the operation unit calculates a resistance increase rate based on the internal resistance calculated by the resistance calculation unit, and calculates an adjustment coefficient based on the calculated resistance increase rate And, it provides a current pattern update device for fast charging, characterized in that for updating the current pattern using the calculated adjustment coefficient and the current pattern.
  • the steps of setting a current pattern for fast charging for the battery module calculating an internal resistance of the battery module; calculating a resistance increase rate of the battery module; calculating an adjustment coefficient based on the resistance increase rate; and adjusting the current pattern by using the adjustment coefficient to generate an adjusted current pattern.
  • a computer program stored in a computer-readable storage medium that causes a computer to execute the method for updating a current pattern for fast charging as described above. do.
  • FIG. 1 is a diagram illustrating a configuration of a battery pack including a battery management system.
  • FIG. 2 is a block diagram illustrating a function of a battery management system according to an embodiment of the present invention.
  • FIG. 3 is a block diagram illustrating detailed functions of an operation unit according to an embodiment of the present invention.
  • FIG. 4 is a diagram schematically illustrating a method of updating a current pattern for fast charging according to an embodiment of the present invention.
  • FIG. 5 is test data showing a change in capacity of a battery module when a current pattern for fast charging is updated according to an embodiment of the present invention.
  • FIG. 6 is a graph illustrating an update timing of a current pattern for fast charging according to an embodiment of the present invention.
  • FIG. 8 is a flowchart illustrating a method of updating a current pattern for fast charging according to an embodiment of the present invention.
  • FIG. 9 is a flowchart illustrating a method of determining an update timing of a current pattern for fast charging according to an embodiment of the present invention.
  • FIG. 10 is a diagram illustrating a modified example of a method of updating a current pattern for fast charging according to the embodiment of FIG. 4 .
  • FIG. 11 is a diagram illustrating another modified example of a method of updating a current pattern for fast charging according to the embodiment of FIG. 4 .
  • FIGS. 4, 10 and 11 are experimental data obtained by measuring a change in capacity of a battery module using the method of updating a current pattern for fast charging of FIGS. 4, 10 and 11 .
  • FIG. 13 is a diagram illustrating a method of updating a current pattern for fast charging according to another embodiment of the present invention.
  • FIG. 14 is a diagram illustrating a modified example of a method of updating a current pattern for fast charging according to the embodiment of FIG. 13 .
  • FIG. 15 is a diagram illustrating another modified example of a method of updating a current pattern for fast charging according to the embodiment of FIG. 13 .
  • 16 is a block diagram illustrating detailed functions of an operation unit according to another embodiment of the present invention.
  • 17 is test data showing a change in capacity of a battery module when a current pattern for fast charging is updated according to another embodiment of the present invention.
  • FIG. 18 is a flowchart illustrating a method of determining when to stop using a battery module according to an embodiment of the present invention.
  • 19 and 20 are graphs for explaining a point in time when the use of a battery module is stopped according to an embodiment of the present invention.
  • 21 is a hardware configuration diagram of a battery management system.
  • first, second, first, or second used in various embodiments may modify various components regardless of order and/or importance, do not limit
  • the first component may be referred to as the second component, and similarly, the second component may also be renamed to the first component.
  • FIG. 1 is a diagram showing the configuration of a battery pack 1 including a battery management system 20 .
  • a battery pack 1 is made of one or more battery cells, and is connected in series to a chargeable/dischargeable battery module 10 and a + terminal side or a - terminal side of the battery module 10 to the battery module.
  • the switching unit 30 for controlling the charge/discharge current flow of (10) and the voltage, current, temperature, etc. of the battery cell and/or battery module 10 are monitored to prevent overcharging and overdischarging, and and a battery management system 20 (hereinafter referred to as 'BMS') to manage.
  • 'BMS' battery management system 20
  • the battery module 10 includes one or more battery cells 11 that can be charged and discharged.
  • the battery cell 11 may be a lithium ion (Li-ion) battery, a lithium ion polymer battery, a nickel cadmium (Ni-Cd) battery, a nickel hydrogen (Ni-MH) battery, etc., but is not limited thereto. does not
  • the BMS 20 may control the operation of the switching unit 30 to control charging and discharging of the battery module 10 .
  • the BMS 20 may monitor the voltage, current, temperature, etc. of the battery module 10 and/or each battery cell 11 included in the battery module 10 .
  • a sensor or various measurement modules not shown may be additionally installed in the battery module 10 , a charging/discharging path, or an arbitrary location such as the battery pack 1 .
  • the BMS 20 may calculate a parameter indicating the state of the battery module 10 , for example, SOC or SOH, based on the monitored measured values such as voltage, current, and temperature.
  • the BMS 20 controls and manages the overall operation of the battery pack 1 .
  • the BMS 20 may include various configurations such as a microcomputer as a controller for executing a program and controlling the overall operation of the BMS 20, input/output devices such as sensors or measuring means, and other peripheral circuits.
  • the BMS 20 may perform rapid charging of the battery module 10 according to a preset algorithm.
  • the preset algorithm may be to charge the battery module 10 according to a specific current pattern.
  • the BMS 20 according to an embodiment of the present invention provides a method for updating a current pattern for fast charging of the battery module 10 and a method for determining an update time.
  • the BMS 20 according to an embodiment of the present invention also provides a method for determining when to stop using the battery module 10 . A detailed description of the function of the BMS 20 will be described later.
  • the switching unit 30 is a semiconductor switching device for controlling a current flow for charging or discharging of the battery module 10 , and for example, at least one MOSFET may be used. It will be readily understood by those skilled in the art that a relay or a contactor may be used as the switching unit 30 in addition to a semiconductor switching element.
  • the battery pack 1 may further be communicatively connected with an external upper controller 2 . That is, the battery pack 1 may transmit various data about the battery pack 1 to the host controller 2 , and may receive a control signal related to the operation of the battery pack 1 from the host controller 2 .
  • the upper controller 2 may be a vehicle controller for controlling the operation of the vehicle when the battery pack 1 is mounted in the electric vehicle.
  • the upper controller 2 may be a rack BMS that manages a plurality of battery modules or a BMS that controls the overall operation of the ESS.
  • FIG. 2 is a block diagram illustrating a function of the battery management system 20 according to an embodiment of the present invention.
  • the BMS 20 may include a resistance calculation unit 110 , a storage unit 120 , a calculation unit 130 , and a communication unit 140 .
  • the resistance calculator 110 calculates the internal resistance of the battery module 10 .
  • the resistance calculator 110 may represent a set of various sensors for calculating the internal resistance of the battery module 10 .
  • the resistance calculator 110 measures the voltage measuring means for measuring the OCV of the battery module 10 , the current measuring means for measuring the current charged and discharged in the battery module 10 , and the temperature of the battery module 10 . It may include at least one of the temperature measuring means for measuring.
  • the resistance calculator 110 may include a calculation means for calculating the internal resistance value of the battery module 10 from a value measured by each measurement means in addition to the various measurement means as described above.
  • the storage unit 120 may store various programs and data necessary for the operation of the BMS 20 .
  • the storage unit 120 may store an algorithm for rapidly charging the battery module 10 as described above.
  • the storage unit 20 may store a current pattern for rapid charging for the battery module 10 for use during rapid charging.
  • Algorithms for fast charging may include information on an update method and update timing of a current pattern for fast charging.
  • the calculator 130 updates the current pattern according to the state of the internal resistance of the battery module 10 . A detailed operation of the operation unit 130 will be described later with reference to FIG. 3 .
  • the communication unit 140 may transmit various types of information about the battery cell 11 , the battery module 10 , and/or the battery pack 1 to the host controller 2 as necessary. Also, the communication unit 140 may receive a control signal for controlling the battery pack 1 from the host controller 2 . When the communication unit 140 determines that the use of the battery module 10 should be stopped, the communication unit 140 may transmit that effect to the host controller 2 .
  • FIG. 3 is a block diagram illustrating detailed functions of the operation unit 130 according to an embodiment of the present invention.
  • the calculation unit 130 includes a resistance increase rate calculation unit 131 , an adjustment coefficient calculation unit 132 , a current pattern calculation unit 133 , an update requirement determination unit 134 , a voltage measurement unit 135 , and the like. may include.
  • the resistance increase rate calculator 131 calculates a resistance increase rate based on the internal resistance calculated by the resistance calculator 110 .
  • the resistance increase rate can be calculated in the following way.
  • the resistance increase rate calculator 131 may calculate a rate at which the internal resistance of the battery module 10 is changed for a predetermined period.
  • the predetermined period may be any period set periodically.
  • the resistance increase rate calculating unit 131 may calculate the resistance increase rate based on the internal resistance measured just before this fast charging is performed and the previously measured internal resistance.
  • the time and period for calculating the internal resistance are only examples and are not limited thereto.
  • the adjustment coefficient calculator 132 calculates an adjustment coefficient based on the resistance increase rate calculated by the resistance increase rate calculator 131 .
  • the adjustment coefficient calculator 132 calculates the adjustment coefficient to decrease the adjustment coefficient as the resistance increase rate increases.
  • the resistance increase rate calculator 131 may calculate the adjustment coefficient according to Equation 2 below.
  • Adjustment factor (100 - ⁇ *(resistance increase rate (%))/100
  • the ⁇ value may be a value determined according to the type of the battery module 10 . That is, the ⁇ value may be a value determined according to chemical components constituting the battery cell, such as whether the battery module 10 is a lithium ion battery or a lithium ion polymer battery. This ⁇ value may have a value between 0.5 and 4.
  • the resistance increase rate calculator 132 may calculate the adjustment coefficient according to Equation 3 below.
  • Adjustment factor 1 / ( ⁇ *(1 + resistance increase rate (%)/100))
  • the ⁇ value at this time is also the same value as the ⁇ value in Equation 2.
  • the resistance increase rate calculator 132 calculates an adjustment coefficient to reduce the current pattern.
  • the algorithm for updating the current pattern for fast charging according to the embodiments of the present invention reduces the current magnitude of the current pattern.
  • the current pattern calculating unit 133 updates the current pattern by using the calculated adjustment coefficient and the current pattern stored in the storage unit 120 . Specifically, the current pattern calculation unit 133 calculates as a new fast charging current pattern for updating a value obtained by multiplying the previously stored current pattern by the adjustment coefficient calculated by the adjustment coefficient calculation unit 132 .
  • FIG. 4 is a diagram schematically illustrating a method of updating a current pattern for fast charging according to an exemplary embodiment. As described above, it indicates that a new current pattern (b) is calculated by multiplying the existing current pattern for fast charging by the adjustment factor (a).
  • the current is gradually reduced according to the state of charge (SOC) of the battery module 10 . As shown in Figure 4, the current pattern is set to charge the current to i1 until the SOC becomes s1, to i2 from s1 to s2, i3 from s2 to s3, and i4 from s3 to full charge. .
  • SOC state of charge
  • the adjustment factor is multiplied to change the current pattern as shown in the dotted line.
  • the current is changed to i1', i2', i3' and i4', respectively.
  • i1' i1*(adjustment coefficient)
  • i2' i2*(adjustment coefficient)
  • i3' i3*(adjustment coefficient)
  • i4' i4*(adjustment coefficient). That is, an existing current pattern is updated with a current pattern having a new magnitude generated by multiplying the magnitude of the current in the current pattern by an adjustment factor (current derating type update).
  • the update requirement determination unit 134 determines when to update the current pattern for fast charging.
  • the update requirement determining unit 134 determines that it is time to update the current pattern when the transition curve of the charging termination voltage, which is the voltage at the completion of charging of the fast charging, satisfies a preset criterion.
  • the preset reference for the transition curve of the charging termination voltage may be an inflection point occurring in the transition curve of the charging termination voltage.
  • the occurrence of the inflection point may be a signal indicating that an abnormality has occurred in the battery cell 11 . Therefore, by monitoring the occurrence of such an inflection point, it is possible to determine the update timing of the current pattern for fast charging.
  • the fast charging current pattern is updated with the new current pattern calculated by the current pattern calculating unit 133 .
  • the updated current pattern may be stored in the storage unit 120 .
  • the voltage measuring unit 135 measures a charging end voltage, which is a voltage at the completion of fast charging, whenever fast charging is performed on the battery module 10 .
  • the voltage measuring unit 135 may be a voltage sensor monitoring the voltage of the battery cell 11 and/or the battery module 10 .
  • the voltage measuring unit 135 may monitor the voltage of the battery module 10 in real time and derive the charging termination voltage by using the voltage at the required time when determining the update requirement.
  • the update requirement is determined using the charging termination voltage, but this is exemplary and not limited thereto.
  • the parameter is correlated with the characteristic of the charging termination voltage, the corresponding parameter may be used as a factor for determining the update requirement.
  • the update requirement may be determined using the resistance value calculated using the charge termination voltage and the OCV value.
  • test data showing a change in capacity of the battery module 10 when a current pattern for fast charging is updated according to an embodiment of the present invention.
  • the current pattern is also changed in consideration of the change in the internal resistance of the battery module 10 . Accordingly, even when the battery module 10 is rapidly charged, the change in capacity of the battery module 10 can be minimized.
  • FIG. 6 is a graph illustrating an update timing of a current pattern for fast charging according to an embodiment of the present invention.
  • the update requirement determination unit 134 detects an inflection point in the transition curve of the charging termination voltage, as indicated by an arrow.
  • a graph of 'Comparative Example 1' is a graph showing a change in the charge termination voltage of the battery module 10 when the update algorithm of the current pattern for fast charging is not applied at all. It was confirmed that the charging termination voltage rapidly increased after about 20 rapid charging cycles.
  • the graph of 'Comparative Example 2' is a graph in which the update algorithm of the fast charging current pattern is applied, but the update time is applied after the inflection point occurs. Compared to Comparative Example 1, it was confirmed that the charging termination voltage did not change even after a considerable number of rapid charging repetitions. However, it was confirmed that the charge termination voltage rapidly increased after about 100 times of rapid charging.
  • the 'Example' graph is a graph in which the update algorithm of the current pattern for fast charging is applied immediately after the inflection point occurs. As can be clearly seen from the graph, it was confirmed that the increase in the charge termination voltage of the battery module 10 was significantly suppressed despite repeated rapid charging of 100 times or more.
  • FIG. 8 is a flowchart illustrating a method of updating a current pattern for fast charging according to an embodiment of the present invention.
  • a current pattern for fast charging is preset in the storage unit 120 of the BMS 20 ( S10 ).
  • the setting of the current pattern may be set before shipment of the battery pack 1 by the manufacturer. Alternatively, even after shipment of the battery pack 1 , a current pattern for fast charging may be set by a manufacturer or a user.
  • the BMS 20 monitors the internal resistance of the battery module 10 ( S11 ). In other words, the internal resistance of the battery module 10 is calculated. Then, a resistance increase rate of the internal resistance is calculated from the monitored internal resistance (S12). Then, an adjustment coefficient is calculated based on the calculated resistance increase rate (S13). Since the calculation of the resistance increase rate and the calculation of the adjustment coefficient in steps S12 and S13 has been described in detail with reference to FIGS. 2 and 3 , a detailed description thereof will be omitted herein.
  • the BMS 20 calls the current pattern for fast charging stored in the storage unit 120 (S14), and determines whether the update requirement of the current pattern is satisfied (S15).
  • the current pattern is updated.
  • the update of the current pattern may be performed using the adjustment coefficient calculated in step S13 and the current pattern called in step S14. If the update requirement of the current pattern is not satisfied (NO in S16), the process returns to step S11 and the algorithm for updating the current pattern is repeatedly performed.
  • 9 is a flowchart illustrating a method of determining an update timing of a current pattern for fast charging according to an embodiment of the present invention. 9 shows detailed steps of step S15 of FIG. 8 .
  • the BMS 20 determines whether the battery pack 1 starts charging (S20), and when it is determined that the charging has started, determines whether the corresponding charging is rapid charging (S21). If charging is not started or charging is not fast charging, since the algorithm according to the embodiments of the present invention is not applied, the process proceeds to step S11.
  • step S25 If an inflection point is detected in the transition curve of the charging termination voltage as a requirement for updating the current pattern for rapid charging (YES in S25), the process proceeds to step S17 to update the current pattern. On the other hand, if no inflection point is detected in the transition curve of the charging termination voltage (NO in S25), it is determined that rapid charging may be performed using the existing current pattern. Therefore, it proceeds to step S11. That is, step S25 corresponds to step S16 of FIG. 8 .
  • FIG. 10 is a diagram illustrating a modified example of a method of updating a current pattern for fast charging according to the embodiment of FIG. 4 .
  • FIG. 10 only the new current pattern obtained by multiplying the current pattern by the adjustment factor is shown.
  • charging is performed in a capacity-limited method, and the current is gradually reduced according to the SOC of the battery module 10 .
  • the current pattern is changed as shown by the dotted line by multiplying the SOC value set at the time of changing the magnitude of the current by the adjustment factor. That is, the point at which the current changes from i1 to i2 is from s1 to s1', the point at which the current changes from i2 to i3 is from s2 to s2', and the point at which the current changes from i3 to i4 changes from s3 to s3'.
  • s1' s1*(steering factor)
  • s2' s2*(steering factor)
  • s3' s3*(steering factor).
  • the existing current pattern is updated with a current pattern in which the value of the new SOC generated by multiplying the value of the SOC set as the time point at which the magnitude of the current in the current pattern is changed by the adjustment factor is the time point at which the magnitude of the current is changed ( SOC-reduced updates).
  • the adjustment coefficient may be a value calculated according to Equation 4 or 5 below. That is, it may be a value different from the adjustment coefficient described in Equations 2 and 3 above.
  • Adjustment factor (100 - ⁇ *(resistance increase rate (%))/100
  • Adjustment factor 1 / ( ⁇ *(1 + resistance increase rate (%)/100))
  • the ⁇ value may also be a value determined according to the type of the battery module 10 . That is, the ⁇ value may be a value determined according to chemical components constituting the battery cell, such as whether the battery module 10 is a lithium ion battery or a lithium ion polymer battery. This ⁇ value may have a value between 0.5 and 4.
  • FIG. 11 is a diagram illustrating another modified example of a method of updating a current pattern for fast charging according to the embodiment of FIG. 4 .
  • FIG. 11 only the new current pattern obtained by multiplying the current pattern by the adjustment factor is shown.
  • charging is performed in a capacity-limited method, and the current is gradually reduced according to the SOC of the battery module 10 .
  • the current pattern is updated in a hybrid update method in which both the current reduction update method described in FIG. 4 and the SOC reduction update method described in FIG. 10 are applied. Accordingly, the magnitude of the current is adjusted according to the adjustment coefficient described with reference to FIG. 4 , and the timing of adjusting the magnitude of the current is adjusted according to the adjustment coefficient described with reference to FIG. 10 .
  • FIG. 12 is experimental data obtained by measuring a change in capacity of a battery module using the method of updating a current pattern for fast charging of FIGS. 4, 10 and 11 .
  • the ⁇ value and the ⁇ value were set to 1.
  • an experiment was performed using four cells with a resistance increase rate of 12% as measurement targets. When there is no current pattern update for each of the four cells, the current-reduced update method, the SOC-reduced update method, and the mixed-type update method were applied, and rapid charging was repeatedly performed.
  • the current pattern is also changed in consideration of the change in the internal resistance of the battery module 10 . Accordingly, even when the battery module 10 is rapidly charged, the change in capacity of the battery module 10 can be minimized.
  • FIG. 13 is a diagram illustrating a method of updating a current pattern for fast charging according to another embodiment of the present invention. Also in FIG. 13, only the new current pattern obtained by multiplying the current pattern by the adjustment factor is shown.
  • FIG. 13 illustrates a case in which charging is performed in a voltage-limited method, in which current is gradually reduced according to a voltage value of the battery module 10 .
  • the current pattern is set to charge the magnitude of the current to i1 until the voltage value is v1, to i2 from v1 to v2, i3 from v2 to v3, and i4 from v3 to full charge.
  • the adjustment factor is multiplied to change the current pattern as shown in the dotted line.
  • the current is changed to i1', i2', i3' and i4', respectively.
  • i1' i1*(adjustment coefficient)
  • i2' i2*(adjustment coefficient)
  • i3' i3*(adjustment coefficient)
  • i4' i4*(adjustment coefficient). That is, an existing current pattern is updated with a current pattern having a new magnitude generated by multiplying the magnitude of the current in the current pattern by an adjustment factor (current derating type update).
  • FIG. 14 is a diagram illustrating a modified example of a method of updating a current pattern for fast charging according to the embodiment of FIG. 13 . Also in FIG. 14, only the new current pattern obtained by multiplying the current pattern by the adjustment factor is shown. Also in this example, charging is performed in a voltage-limited method, and the current is gradually reduced according to the voltage value of the battery module 10 .
  • the current pattern is changed as shown by the dotted line by multiplying the voltage value set at the time of changing the magnitude of the current by the adjustment factor. That is, the point at which the current changes from i1 to i2 changes from v1 to v1', the point at which the current changes from i2 to i3 changes from v2 to v2', and the point at which the current changes from i3 to i4 changes from v3 to v3'. .
  • v1' v1*(adjustment factor)
  • v2' v2*(adjustment factor)
  • v3' v3*(adjustment factor).
  • the existing current pattern is updated with a current pattern in which a new voltage value generated by multiplying a voltage value set as a time point for changing the magnitude of the current in the current pattern by an adjustment factor is a time point for changing the magnitude of the current (voltage reduction brother update).
  • the adjustment coefficient according to FIG. 13 and the adjustment coefficient according to FIG. 14 may be separately calculated as in FIGS. 4 and 10 .
  • FIG. 15 is a diagram illustrating another modified example of a method of updating a current pattern for fast charging according to the embodiment of FIG. 13 . Also in FIG. 15, only the new current pattern obtained by multiplying the current pattern by the adjustment factor is shown. Also in this example, charging is performed in a voltage-limited method, and the current is gradually reduced according to the voltage value of the battery module 10 .
  • the current pattern is updated using a hybrid update method in which both the current reduction update method described in FIG. 13 and the voltage reduction update method described in FIG. 14 are applied. Accordingly, the magnitude of the current is adjusted according to the adjustment coefficient described with reference to FIG. 13 , and the timing of adjusting the magnitude of the current is adjusted according to the adjustment coefficient described with reference to FIG. 14 .
  • the battery module ( 10) can be minimized.
  • FIG. 16 is a block diagram illustrating detailed functions of an operation unit according to another embodiment of the present invention. Here, differences from FIG. 3 will be mainly described.
  • the update requirement determination unit 134 determines when to update the current pattern for fast charging.
  • the current pattern for rapid charging is applied to a voltage-limited type of charging until the battery module 10 reaches a preset voltage.
  • the update requirement determining unit 134 determines that it is time to update the current pattern when the transition curve of the charging end capacity, which is the capacity at the completion of charging of the fast charging, satisfies a preset criterion.
  • the preset reference for the transition curve of the charging end capacity may be an inflection point in the transition curve of the charging end capacity.
  • the fast charging current pattern is updated with the new current pattern calculated by the current pattern calculating unit 133 .
  • the updated current pattern may be stored in the storage unit 120 .
  • the capacity calculating unit 136 calculates the charging end capacity, which is the capacity of the battery module 10 at the completion of the fast charging, whenever fast charging is performed on the battery module 10 .
  • the capacity calculator 136 may use a sensor for monitoring voltage, current, etc. of the battery battery cell 11 and/or the battery module 10 .
  • the capacity calculator 136 may calculate the battery module 10 by a method such as calculating the capacity of the battery module 10 from a value measured using a sensor.
  • 17 is test data showing a change in capacity of a battery module when a current pattern for fast charging is updated according to another embodiment of the present invention.
  • a graph of 'Comparative Example 1' is a graph showing a change in the charging end capacity of the battery module 10 when the update algorithm of the current pattern for fast charging is not applied at all. It was confirmed that the charging end capacity rapidly increased after about 20 rapid charging cycles.
  • the graph of 'Comparative Example 2' is a graph in which the update algorithm of the current pattern for fast charging is applied, but the update time is applied after the inflection point occurs. It was confirmed that the charging end capacity did not change even after a considerable number of rapid charging repetitions compared to Comparative Example 1. However, it was confirmed that the charging end capacity rapidly increased after about 60 times of rapid charging.
  • the 'Example' graph is a graph in which the update algorithm of the current pattern for fast charging is applied immediately after the inflection point occurs. As can be clearly seen from the graph, it was confirmed that there is little increase in the charging end capacity of the battery module 10 despite repeated rapid charging of 100 times or more.
  • FIG. 18 is a flowchart illustrating a method of determining when to stop using a battery module according to an embodiment of the present invention.
  • an algorithm for determining when to stop using a battery module determines whether rapid charging is performed ( S30 ).
  • the current pattern for fast charging is already applied to the update algorithm according to the embodiment of the present invention.
  • a charging end voltage or a charging end capacity is detected (S31).
  • the detected charging termination voltage or charging termination capacity has fluctuated by more than a reference value (S32).
  • the determination of whether or not the reference value has changed may include determining whether the charging end voltage is greater than or equal to the reference value.
  • the determination of whether the change by more than the reference value may include determining whether the charging end capacity is less than the reference value.
  • the use limit of the battery module 10 When the charging termination voltage or charging termination capacity fluctuates more than the reference value, it is determined that the use limit of the battery module 10 is reached and the use of the battery module 10 is stopped (S33). In addition, the purpose of discontinuing use of the battery module 10 may be notified to the host controller 2 or the like. On the other hand, when the charging end voltage or the charging end capacity does not fluctuate more than the reference value, it is determined that the battery module 10 can be used continuously.
  • 19 and 20 are graphs for explaining a point in time when the use of a battery module is stopped according to an embodiment of the present invention.
  • the determination of when to stop using the battery module 10 may use another method. For example, it may be set to stop using the battery module 10 when the number of times that an inflection point is detected in the transition curve of the previously detected charging termination voltage or charging termination capacity becomes a preset reference number.
  • 21 is a hardware configuration diagram of a battery management system.
  • the BMS 20 may include a controller (MCU) 210 , a memory 220 , an input/output interface 230 , and a communication interface 240 .
  • MCU controller
  • the BMS 20 may include a controller (MCU) 210 , a memory 220 , an input/output interface 230 , and a communication interface 240 .
  • the MCU 210 processes various operations and calculations in the BMS 20 and controls each configuration.
  • the memory 220 an operating system program and a program for performing a function of the BMS 20 are recorded. That is, in the memory 220, an algorithm for updating a current pattern for fast charging according to embodiments of the present invention, an update time of the current pattern, an algorithm for determining when to stop using the battery module 10, etc. are described in a computer A program may be stored.
  • the memory 220 may include a volatile memory and a non-volatile memory.
  • the memory 220 may be at least one of various storage media such as a semiconductor memory such as a RAM, a ROM, and a flash memory, a magnetic disk, and an optical disk.
  • the memory 220 may be a memory built into the MCU 210 , or may be an additional memory installed separately from the MCU 210 .
  • the input/output interface 230 performs input/output of various input signals and output signals.
  • the MCU 210 included in the BMS 20 may receive signals from various sensors through the input/output interface 230 .
  • the communication interface 240 is configured to communicate with the outside by wire and/or wirelessly.
  • the resistance calculation unit 110 By executing the program stored in the memory 220 by the MCU 210, the resistance calculation unit 110, the calculation unit 130, the resistance increase rate calculation unit 9131, the adjustment coefficient calculation unit 132, the current pattern calculation unit 133, A module that performs the functions of the update requirement determining unit 134 and the capacity calculating unit 136 may be implemented.
  • the memory 220 may function as the storage unit 120 .
  • the MCU 210 may operate together with the input/output interface 230 to perform functions as the resistance calculating unit 110 and the voltage measuring unit 135 . Also, the MCU 210 may operate together with the communication interface 240 to perform a function as the communication unit 140 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
PCT/KR2020/008568 2019-12-19 2020-07-01 급속 충전용 전류 패턴 업데이트 장치, 방법 및 이를 수행하는 저장매체에 저장된 컴퓨터 프로그램 WO2021125475A1 (ko)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202080071176.XA CN114514435A (zh) 2019-12-19 2020-07-01 更新快速充电的电流模式的装置和方法以及存储在存储介质中、用于执行该方法的计算机程序
US17/771,624 US20230022874A1 (en) 2019-12-19 2020-07-01 Apparatus, method and computer program for updating current pattern for quick charge
JP2022520242A JP7376002B2 (ja) 2019-12-19 2020-07-01 急速充電用電流パターン更新装置、方法、及びそれを行う格納媒体に格納されたコンピュータプログラム
EP20902599.8A EP4033631A4 (en) 2019-12-19 2020-07-01 DEVICE AND METHOD FOR UPDATING CURRENT PATTERNS FOR FAST CHARGING, AND A COMPUTER PROGRAM STORED IN A STORAGE MEDIUM FOR CARRYING OUT THEREOF

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2019-0171205 2019-12-19
KR1020190171205A KR20210079085A (ko) 2019-12-19 2019-12-19 급속 충전용 전류 패턴 업데이트 장치, 방법 및 이를 수행하는 저장매체에 저장된 컴퓨터 프로그램

Publications (1)

Publication Number Publication Date
WO2021125475A1 true WO2021125475A1 (ko) 2021-06-24

Family

ID=76476610

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2020/008568 WO2021125475A1 (ko) 2019-12-19 2020-07-01 급속 충전용 전류 패턴 업데이트 장치, 방법 및 이를 수행하는 저장매체에 저장된 컴퓨터 프로그램

Country Status (6)

Country Link
US (1) US20230022874A1 (ja)
EP (1) EP4033631A4 (ja)
JP (1) JP7376002B2 (ja)
KR (1) KR20210079085A (ja)
CN (1) CN114514435A (ja)
WO (1) WO2021125475A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20240050006A (ko) * 2022-10-11 2024-04-18 주식회사 엘지에너지솔루션 배터리 급속 충전 장치 및 방법

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3676134B2 (ja) * 1998-11-30 2005-07-27 三洋電機株式会社 充放電制御方法
JP2016023967A (ja) * 2014-07-17 2016-02-08 日立オートモティブシステムズ株式会社 電池状態検知装置、二次電池システム、電池状態検知プログラム、電池状態検知方法
JP2017017907A (ja) * 2015-07-02 2017-01-19 日立オートモティブシステムズ株式会社 電池制御装置
KR20170086876A (ko) * 2016-01-19 2017-07-27 주식회사 엘지화학 리튬 이차전지의 충방전 방법

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5089825B2 (ja) 2011-03-18 2012-12-05 パナソニック株式会社 非水電解質二次電池の充電方法、及び電池パック
JPWO2014148018A1 (ja) 2013-03-19 2017-02-16 三洋電機株式会社 二次電池の充電システム及び方法並びに電池パック
JP2018046667A (ja) * 2016-09-14 2018-03-22 株式会社東芝 充電パターン作成装置、充電制御装置、充電パターン作成方法、プログラム、及び蓄電システム
US11150307B2 (en) * 2018-04-10 2021-10-19 Lg Chem, Ltd. Apparatus and method for diagnosing battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3676134B2 (ja) * 1998-11-30 2005-07-27 三洋電機株式会社 充放電制御方法
JP2016023967A (ja) * 2014-07-17 2016-02-08 日立オートモティブシステムズ株式会社 電池状態検知装置、二次電池システム、電池状態検知プログラム、電池状態検知方法
JP2017017907A (ja) * 2015-07-02 2017-01-19 日立オートモティブシステムズ株式会社 電池制御装置
JP2018186101A (ja) * 2015-07-02 2018-11-22 日立オートモティブシステムズ株式会社 電池制御装置、電池パック
KR20170086876A (ko) * 2016-01-19 2017-07-27 주식회사 엘지화학 리튬 이차전지의 충방전 방법

Also Published As

Publication number Publication date
EP4033631A4 (en) 2022-12-14
US20230022874A1 (en) 2023-01-26
CN114514435A (zh) 2022-05-17
JP2022550943A (ja) 2022-12-06
EP4033631A1 (en) 2022-07-27
KR20210079085A (ko) 2021-06-29
JP7376002B2 (ja) 2023-11-08

Similar Documents

Publication Publication Date Title
WO2019027190A1 (ko) 배터리 관리 장치 및 이를 포함하는 배터리 팩
WO2018235995A1 (ko) 전기자동차용 배터리의 열화 발생을 저감하면서 고속충전과 최대방전을 수행하기 위한 방법 및 그 장치
WO2019074221A1 (ko) 이차 전지의 충전 상태를 추정하기 위한 장치 및 그 방법
WO2010016647A1 (en) Apparatus and method for estimating state of health of battery based on battery voltage variation pattern
WO2020189914A1 (ko) 배터리 상태 추정 장치
WO2017086512A1 (ko) 열적 안전성을 고려한 배터리의 급속 충전 시스템 및 방법
WO2020213905A1 (ko) 배터리의 퇴화 상태를 결정하기 위한 장치, 방법, 배터리 팩 및 전기 차량
WO2018124514A1 (ko) 배터리 관리 장치 및 이를 이용한 리튬인산철 셀의 과전압 보호 방법
WO2021118118A1 (ko) 배터리 퇴화도 진단 장치 및 방법
WO2016068652A2 (ko) 개방전압 추정 장치 및 방법
WO2022092827A1 (ko) 배터리 관리 장치 및 방법
WO2021118049A1 (ko) 전극의 상대적 퇴화도를 이용한 이차 전지의 동작 제어 장치 및 방법
WO2021107323A1 (ko) 배터리 셀 이상 퇴화 진단 장치 및 방법
WO2021125475A1 (ko) 급속 충전용 전류 패턴 업데이트 장치, 방법 및 이를 수행하는 저장매체에 저장된 컴퓨터 프로그램
WO2022145822A1 (ko) 배터리 관리 장치 및 방법
WO2018131874A1 (ko) 에너지 절약 및 빠른 셀 밸런싱이 가능한 충전 제어 장치 및 방법
WO2019093625A1 (ko) 충전 제어 장치 및 방법
WO2022124773A1 (ko) 배터리 진단 장치 및 방법
WO2023106592A1 (ko) 배터리 상태 모니터링 장치 및 방법, 그리고 배터리 보호 장치
WO2022075628A1 (ko) 배터리 퇴화도 산출 방법 및 배터리 퇴화도 산출 장치
WO2022114826A1 (ko) 배터리 관리 장치 및 방법
WO2022215962A1 (ko) 배터리 진단 장치 및 방법
WO2022108344A1 (ko) 배터리 관리 장치 및 방법
WO2022059957A1 (ko) 배터리 팩 및 배터리 팩의 제어방법
WO2024014850A1 (ko) 배터리 관리 장치 및 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20902599

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2022520242

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2020902599

Country of ref document: EP

Effective date: 20220420

NENP Non-entry into the national phase

Ref country code: DE